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Old 05-16-2021, 01:08 PM   #1
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Non-Ethanol Gas

I'm about ready to head out for my annual two month trip up the east coast from Fl. My gas tank is down about 25 gallons ( 75 gallon tank ) is it worth it to top off the 25 gallons with NON ethanol gas before taking off up the highway ?
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Old 05-16-2021, 01:11 PM   #2
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Originally Posted by kchadw1944 View Post
I'm about ready to head out for my annual two month trip up the east coast from Fl. My gas tank is down about 25 gallons ( 75 gallon tank ) is it worth it to top off the 25 gallons with NON ethanol gas before taking off up the highway ?

For me, quite a lot of the decision would be based on the price delta between the two. Assume a small MPG increase with non-ethanol fuel, but in most areas there is a very healthy price boost to non-ethanol.
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Old 05-16-2021, 01:12 PM   #3
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Well, if you don't you might be wishing you had further up the road.

A bird in hand is worth 10 in the bush.

Are you asking if it's better for gas mileage? Or is that all you can get?
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Old 05-16-2021, 01:40 PM   #4
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Originally Posted by kchadw1944 View Post
I'm about ready to head out for my annual two month trip up the east coast from Fl. My gas tank is down about 25 gallons ( 75 gallon tank ) is it worth it to top off the 25 gallons with NON ethanol gas before taking off up the highway ?
You don't say what this gas is for? Is it for your motorhome? a pickup, or is it extra gas you use for your toys?

Makes a big difference. Most modern vehicle engines don't perform any better or get any better mileage on 10% ethanol gas. I do run it in my Harley and my son's old boat, but that's it.

The idea that you get better performance out of a regular lead free burning car is psychological. You pay more so it must be running better right?
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Old 05-16-2021, 02:04 PM   #5
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If the non-ethanol price is competitive, I always choose it. Everything I own runs better on straight gasoline.
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Old 05-16-2021, 02:38 PM   #6
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Quote: "Ethanol contains about one-third less energy than gasoline. So, vehicles will typically go 3% to 4% fewer miles per gallon on E10 and 4% to 5% fewer on E15 than on 100% gasoline.3
reference: https://fueleconomy.gov/feg/ethanol.shtml
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Old 05-16-2021, 02:48 PM   #7
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You ask if it's worth it to fill your tank with non-ethanol gas - is it worth WHAT? Define 'it' for us. What is it you're trying to accomplish?
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Old 05-16-2021, 03:05 PM   #8
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"Ethanol contains about one-third less energy than gasoline. So, vehicles will typically go 3% to 4% fewer miles per gallon on E10 and 4% to 5% fewer on E15 than on 100% gasoline."
That's the only scientific fact in this discussion. If you could get non-ethanol gas for less than 4% more $$ than E10, it's "worth it". If not, you are buying it for some other reason.


I doubt if you would even notice the mpg difference of a mere 25 gallons (out of 75?). You are getting maybe 8 mpg and get a 4% (0.32 mpg) improvement for 1/3 of a tank?
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Old 05-16-2021, 03:09 PM   #9
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That's the only scientific fact in this discussion. If you could get non-ethanol gas for less than 4% more $$ than E10, it's "worth it". If not, you are buying it for some other reason.


I doubt if you would even notice the mpg difference of a mere 25 gallons (out of 75?).

Good analysis, Gary.


Same math should apply to E85 vs gasoline (E10-20 depending on farm lobby's effectiveness). E85 gives so much lower MPG that even the EPA has to publish both E85 and gasoline figures for vehicles rated to use E85.
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Old 05-16-2021, 03:53 PM   #10
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Non-ethanol gas is about 35 cents per gallon more here! I use it for my lawn tractor and weed eater, but not for vehicles!
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Old 05-16-2021, 04:02 PM   #11
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I didn't know non ethanol gas was still available. After reading this post I did a local search here in Las Vegas and found a few stations that have it. Very expensive.
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Old 05-16-2021, 04:37 PM   #12
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Ethanol is a solvent compared to non. For boaters it's a nightmare - dissolves stuff in the fuel tank, attracts water into the fuel, eats away unrated fuel lines and also is not rated for the older outboards. I use it for lawn mowers, anything 2 cycle like my boat engines, lawn stuff.
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Old 05-16-2021, 04:38 PM   #13
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Originally Posted by amosnandy View Post
You don't say what this gas is for? Is it for your motorhome? a pickup, or is it extra gas you use for your toys?

Makes a big difference. Most modern vehicle engines don't perform any better or get any better mileage on 10% ethanol gas. I do run it in my Harley and my son's old boat, but that's it.

The idea that you get better performance out of a regular lead free burning car is psychological. You pay more so it must be running better right?

Ethanol fuel has less BTU's than straight gasoline.
https://chemeng.queensu.ca/courses/C...ing-values.pdf

You get more power per gallon of straight gas than you would with gas/ethanol fuel. Ergo, more power, better mileage.
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Old 05-16-2021, 06:39 PM   #14
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Non-ethanol gas is about 35 cents per gallon more here! I use it for my lawn tractor and weed eater, but not for vehicles!
X2. I would love to have access to non-ethanol for things that don't get used regularly. Unfortunately, our only option here in Calif is ethanol. I use fuel treatment in the boat but in reality probably use it frequently enough to not have to worry.
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